accordion <div> heading

Author: mikehoffms

exploring-the-universe/README.md

@@ -50,7 +50,7 @@ To produce a **poor** or **needs improvement** metric on the **LCP**, **CLS**, a
 
    The **CLS** card illustrates that sudden, unexpected jumps in the layout can negatively impact users.  This is also due to the image taking some time to load.  By design, the demo webpage neglects to specify a height for the image, and so the page initially loads without reserving much space for the image.  When the image starts appearing, the content below it suddenly jumps down.
 
-1. After the galaxy image finishes rendering, in the rendered demo page, click an accordion heading (`<div class="accordion-panel">`) in the right-hand column, such as **Laws of Planetary Motion (1609-1619)**.
+1. After the galaxy image finishes rendering, in the rendered demo page, click an accordion \<div\> heading in the right-hand column, such as **Laws of Planetary Motion (1609-1619)**.
 
    The **INP** card changes from not showing a value, to showing an orange value and **needs improvement**, or a red value and **poor**.  An **INP** value is displayed.